Thursday, 19 December 2013

18th Dec Harrier Update

Many thanks to Stephen Murphy for this update.

Dear All,

The recent dour weather has reduced the efficiency
of the satellite tags hence the amount of data from the birds. Grainne’s
transmitter has not been able to pull in enough light in recent weeks.
Therefore, despite not featuring below, it is not because she suddenly
disappeared off the map. I hope the next few clear crisp bright mornings will
bring her back on line.

At this time of year the young hen harriers are
usually in distinct home ranges and the area of land they utilise generally
contracts. They will now be adept hunters having worked out where the prey is
and how to catch it. They will also have a good spatial awareness of the
landscape/topography knowing how to use its physical properties to sneak up on
prey and where to roost.

I have been lucky to see hen harriers in both
lowland and upland sites in the last fortnight in great company. Many of the
birds are returning to the roost well fed, most birds sporting massive noticeable crops.
Does their strike rate increase in these wild windy and wet
conditions? The harriers seem to revel
in the wind and it could actually help them as we have recorded successful
stoops on small passerines struggling to get airborne or whilst trying to fly
into the wind.

Miranda is in County Mayo. I type
this as severe westerly’s rip across the country and 70-80mph gusts, driving
rain and sleet are buffeting the trees outside and howling down the chimney. It
must be bad as the two televised cup football matches were temporary halted by
the referee due to horizontal white out sleet and swirling gale force
winds.

Hattie is still the “homely girl”
the least travelled of all satellite-tracked birds.